Rank order filter

Details Rank order filter Rank order filter

1997-05-05

1998-04-07

Ngo, Chuong Dinh

Boots, shoes, and leggings

3401462, G06F 700, G05B 100

Patent

active

057372519

ABSTRACT:
A rank order filter is disclosed in which the maximum value, the minimum value and the median value are determined in a 3.times.3 local area having three sample values in each of column and row. The three sample values in the 3.times.3 local area are rearranged in descending order of magnitude by column, and the maximum values or the minimum values in each column are compared with each other thereby to determine the maximum value or the minimum value in the 3.times.3 local area. Also, after comparing the median values with each other in each column, the maximum value in the column having the minimum median value, the minimum value in the column having the maximum median value and the median value in the column having the median median value are compared with each other. The result of comparison is used to determine the median value in the 3.times.3 local area.

REFERENCES:
patent: 3740538 (1973-06-01), Hemphill
patent: 4513440 (1985-04-01), Delman
patent: 4651301 (1987-03-01), Ballmer et al.
patent: 4802108 (1989-01-01), Bagdis et al.
patent: 4918636 (1990-04-01), Iwata et al.
patent: 5122979 (1992-06-01), Culverhouse
patent: 5220664 (1993-06-01), Lee

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